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从人表皮角质形成细胞生成诱导多能干细胞。

Generation of Induced Pluripotent Stem Cells from Human Epidermal Keratinocytes.

作者信息

Yang Yu-Hua, Zhang Ru-Zhi, Cheng Sai, Xu Bin, Tian Ting, Shi Hai-Xia, Xiao Li, Chen Ren-He

机构信息

1 Department of Dermatology, The Third Affiliated Hospital of Suzhou University , Changzhou, China .

2 Department of Dermatology, The First Affiliated Hospital of XinXiang Medical College , XinXiang, China .

出版信息

Cell Reprogram. 2018 Dec;20(6):356-364. doi: 10.1089/cell.2018.0035. Epub 2018 Nov 2.

Abstract

Induced pluripotent stem cells (iPSCs) play an important role in cell replacement therapy. Several studies have shown that keratinocytes are promising reprogrammed cells. We easily and efficiently enriched epidermal stem cells by attaching them for a limited time in culture dishes. Individual epidermal cells enriched in stem cells, which showed strong immunostaining for K15, were obtained and generated iPSCs within 10 days after transfection with lentiviruses encoding 4 transcription factors (OCT4, SOX2, KLF4, and NANOG). Immunofluorescent staining showed that those iPSCs expressed SOX2, OCT4, NANOG, and SSEA3 (a specific marker of embryonic stem cells). The embryoid bodies generated from those iPSCs stained positively for OCT4 and NANOG and also with the CDy1 dye that is specific for stem cells. When the iPSCs were subcutaneously injected into 4-week-old BALB/c nude mice, teratoma developed at the inoculation site. The iPSCs also demonstrated reduced DNA methylation compared with the original cells and could be induced to differentiate into adipocytes (mesodermal), hepatocytes (endodermal), and neural cells (ectodermal) in vitro. Our research provides an easy and efficient method for producing iPSCs from keratinocytes, which has important applications in cell replacement therapy.

摘要

诱导多能干细胞(iPSCs)在细胞替代疗法中发挥着重要作用。多项研究表明,角质形成细胞是很有前景的重编程细胞。我们通过在培养皿中有限时间贴壁培养,轻松高效地富集了表皮干细胞。获得了富集干细胞的单个表皮细胞,这些细胞对K15显示出强烈的免疫染色,在用编码4种转录因子(OCT4、SOX2、KLF4和NANOG)的慢病毒转染后10天内产生了iPSCs。免疫荧光染色显示,那些iPSCs表达SOX2、OCT4、NANOG和SSEA3(胚胎干细胞的特异性标志物)。由那些iPSCs产生的胚状体对OCT4和NANOG染色呈阳性,并且也用对干细胞特异性的CDy1染料染色呈阳性。当将iPSCs皮下注射到4周龄的BALB/c裸鼠中时,接种部位形成了畸胎瘤。与原始细胞相比,iPSCs还表现出DNA甲基化减少,并且在体外可被诱导分化为脂肪细胞(中胚层)、肝细胞(内胚层)和神经细胞(外胚层)。我们的研究提供了一种从角质形成细胞产生iPSCs的简便高效方法,这在细胞替代疗法中具有重要应用。

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